DryLin® W 'Turn-To-Fit' adjustable carriages allow you to set the clearance for your application by using a set screw. The design also has a unique 'clicking' feature which audibly enables you to hear each revolution - so you can adjust to a set torque level and back off any number of revolutions to achieve your required fit. Currently available only in zinc-cast versions. Manual adjustable clearance by "Turn-to-Fit" function with allen key 100% lubrication-free Compact dimensions 8 different rail profiles available